Ice-cream freezer.



No. 637,078. Patented Nov. 14,1899. F. P. BURR.

ICE CREAM FREEZER.

(Application filed Dec. 29, was. (N o M o d e I x lily a a I W/ TNESSESINVENTOI? V By W ATTORNEYS UNITED STATES v PATENT OFFICE.

FREDERICK PIERC BURR, OF MIDDLETOWN, CONNECTICUT.

ICE- RE F EEzEFi.

SPECIFICATION forming we of Letters Patent No. 637,078, dated. November14, 1899. Application filed December 29, i898. Serial No. 700,631. (Nomodel.)

; ed a new and Improved Ice-Cream Freezer,

of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved ice-creamfreezer which is simple and durable in constructiomvery effective andeconomical in operation, and arranged to require but a slight effort onthe part of the operator to bring the matter to be frozen to the desiredcondition in a very short time.

Theinvention consists of novel features and parts and combinations ofthe same, as will be fully described hereinafter and then pointed out inthe claim.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a sectional side elevation of the improvement on the line 1l in Fig. 2. Fig. 2 is a plan view of the same with part broken out.Fig. 3 is an enlarged sectional side elevation of the upper bearing forthe receptacle, and Fig. 4 is a like view of the bottom bearing for thereceptacle.

The improved ice-Cream freezer is provided with a vessel A in the shapeof a pail .or the like, supporting on its bottom a step B, engaged by abearing B on the under side of the bottom of the receptacle 0,preferably in the form of a can, having a removable cover C. The saidcover has fixed on its upper surface apulley 0 formed with an upperflange 0 and a central bearing 0 the latter being adapted for engagementwith a pin D, secured to the cover or bridge A for the vessel A, saidcover or bridge being removably secured to said vessel by suitablefastening devices E. The flange O of the pulley C fits into a recess A011 the under side of the cover or bridge A, and a cord, band, chain, orlike flexible strip F is secured to the pulley and is adapted to wind onand unwind from the latter. This flexible strip F is secured at itsinner end to said pulley, and after winding around the same extendsthrough a guideway A to the outside of the vessel A, and is propositedirection to the last.

Vided at its outer end with a handle F, preferably in the form of a ringadapted to be taken hold of by the operator. It will be seen that theuppersurface of the can-cover 0 forms practically a lower flange for thepulley, the strip F being thereby guided between the flange C and thesaid upper surface of the cover. It is evident that when a pull isexerted on the ring F and the strip F a rotary motion is given to thepulley G the cap 0, and the receptacle 0, so that the strip F unwinds,and as the receptacle keeps on rotating the strip is again wound uponthe pulley, but in a reverse direction, and when the receptacle finallycomes to a standstill at the time the strip F is nearly wound up thenanother pull is given to the strip by the operator pulling the handle Fa second time, so that the receptacle is again rotated, but in anopposite direction. The strip F again unwinds and is rewound in anopposite direction to the last winding, so that when the next pull isexerted on the strip a rotary motion is again imparted to the receptacle0 in the op- Thus it will be seen that by the consecutive pulls given tothe strip F the receptacle 0 is alternately rotated in oppositedirections.

In the vessel A is arranged a perforate guard G in the form ofwire-netting, separated at its lower end to form outwardly-extendingfeet G for supporting the guard on the bottom of the vessel A. The guardG fits snugly to the external surface of the receptacle O,Without,however, touching the latter, the guard serving to keep the ice H in thevessel between the wall thereof and the guard.

from coming in Contact with the revoluble receptacle C. The freezing orsaline liquid mixture H can readily pass through the meshes of theguardG and come in Contact with the external surface of the receptacle0.

The operation is as follows: When the receptacle O is filled with thematter to be frozen and the ice H, with the freezing mixture H, isplaced into the vessel A, as described, and the said receptacle isrotated alternately in opposite directions, then the liquid matterwithin the receptacle is caused to travel in the receptacle and to flowup on the innerwall thereof to form a hollow center, and at the sametime the liquid freezing mixtoo ture H is caused to travel in the vesselA and to move up on the external surface of the said receptacle toinsure a thorough cooling and final freezing of the contents of thereceptacle, it being understood that the freezing mixture is severaldegrees colder than the ice, and consequently a rapid freezing of thecontents of the receptacle takes place, especially as but a thin layerof the liquid matter within the receptacleis opposite the layer offreezing mixture on the outside of said receptacle.

It is understood that by rapidly changing the direction of the rotationof the receptacle, its contents, and the freezing mixture H,

the contents, as well as the freezing mixture, are constantly agitatedto cause a very quick freezing of the contents of the receptacle. As thefreezing mixture H is agitated it searches through the ice,, therebycausing a rapid melting of the ice and a consequent taking up of heat toinsure a very quick freezing of the contents of the receptacle. As thecontents of the receptacle 0 revolve with the receptacle and as thereceptacle is not hindered in any way in its rotary motion during thefreezing operation, it is evident that very little power is requiredfrom the beginning to the end 'of the operation. Thus the freezer worksjust as easily at the beginning of the operation as when the contents ofthe receptacle O are frozen harder than the ice.

As the can has a tight-fitting cover, when the cover is in place thereis no opening through which the saline solution can gain access to theinteriorof the can and spoil the contents, and also the contents of thecan will not escape if the can is rolled about or upset.

As the contents of can 0 have a rapid centrifugal motion, as well as apulsating upand-down motion, which motions are instantly reversed atvery short intervals by the ever-reversing motions of the can, thecontents of the can are in a state of elfervescence until solidified.Consequently no scraper or agitator is required. Without this reversemotion and with the centrifugal force exerted constantly in onedirection the more solid or creamy part of the contents of the can wouldseek the periphery, while the watery or more fluid portion would takethe center, and consequently make a mixer or scraper necessary forfreezing a uniform cream or ice.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent An ice-cream freezer, comprising a receptaclefor the freezing medium, a reticulated cylindrical guard in saidreceptacle having its lower end separated and bent outwardly whereby toform supporting-feet, the freezing medium being adapted to be placedbetween said guard and the walls of the receptacle, a can mounted toturn in said receptacle and within the guard, being close to but spacedfrom the latter, a closed cover tightly held on the said can and havinga pulley rigidly secured to its upper face, the said pulley beingprovided with an upper flange and a central recess, a flexible stripadapted to wind on and unwind from said pulley, and a bridge detachablysecured to said receptacle and extending across the top thereof, thesaid bridge being provided with a pin adapted to enter the recess in thepulley, as and for the purpose set forth.

FREDERICK PIEROE BURR.

Witnesses:

ELISHA T. SAGE, Gno. A. PALMER.

